100 points for this i need it asap Which of the following is an example of a concurrent power?

Signing a trade treaty with a foreign country
Building a new interstate highway
Collecting taxes
Determining the legal marriage age

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.

Is there a passage that comes with this question or should i know this right off the bat, because if it is, i probably have short term memory loss or college is too stressful

Ataxation measure enacted to raise revenues for a standing british army in america